/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License, version
 * 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package io.netty.handler.codec.http.websocketx;

import io.netty.handler.codec.http.DefaultFullHttpRequest;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.HttpRequest;
import io.netty.handler.codec.http.HttpVersion;

import static io.netty.handler.codec.http.HttpVersion.*;

public class WebSocketRequestBuilder
{

    private HttpVersion httpVersion;

    private HttpMethod method;

    private String uri;

    private String host;

    private String upgrade;

    private String connection;

    private String key;

    private String origin;

    private WebSocketVersion version;

    public WebSocketRequestBuilder httpVersion(HttpVersion httpVersion)
    {
        this.httpVersion = httpVersion;
        return this;
    }

    public WebSocketRequestBuilder method(HttpMethod method)
    {
        this.method = method;
        return this;
    }

    public WebSocketRequestBuilder uri(CharSequence uri)
    {
        if (uri == null)
        {
            this.uri = null;
        }
        else
        {
            this.uri = uri.toString();
        }
        return this;
    }

    public WebSocketRequestBuilder host(CharSequence host)
    {
        if (host == null)
        {
            this.host = null;
        }
        else
        {
            this.host = host.toString();
        }
        return this;
    }

    public WebSocketRequestBuilder upgrade(CharSequence upgrade)
    {
        if (upgrade == null)
        {
            this.upgrade = null;
        }
        else
        {
            this.upgrade = upgrade.toString();
        }
        return this;
    }

    public WebSocketRequestBuilder connection(CharSequence connection)
    {
        if (connection == null)
        {
            this.connection = null;
        }
        else
        {
            this.connection = connection.toString();
        }
        return this;
    }

    public WebSocketRequestBuilder key(CharSequence key)
    {
        if (key == null)
        {
            this.key = null;
        }
        else
        {
            this.key = key.toString();
        }
        return this;
    }

    public WebSocketRequestBuilder origin(CharSequence origin)
    {
        if (origin == null)
        {
            this.origin = null;
        }
        else
        {
            this.origin = origin.toString();
        }
        return this;
    }

    public WebSocketRequestBuilder version13()
    {
        version = WebSocketVersion.V13;
        return this;
    }

    public WebSocketRequestBuilder version8()
    {
        version = WebSocketVersion.V08;
        return this;
    }

    public WebSocketRequestBuilder version00()
    {
        version = null;
        return this;
    }

    public WebSocketRequestBuilder noVersion()
    {
        return this;
    }

    public FullHttpRequest build()
    {
        FullHttpRequest req = new DefaultFullHttpRequest(httpVersion, method,
                uri);
        HttpHeaders headers = req.headers();

        if (host != null)
        {
            headers.set(HttpHeaderNames.HOST, host);
        }
        if (upgrade != null)
        {
            headers.set(HttpHeaderNames.UPGRADE, upgrade);
        }
        if (connection != null)
        {
            headers.set(HttpHeaderNames.CONNECTION, connection);
        }
        if (key != null)
        {
            headers.set(HttpHeaderNames.SEC_WEBSOCKET_KEY, key);
        }
        if (origin != null)
        {
            headers.set(HttpHeaderNames.SEC_WEBSOCKET_ORIGIN, origin);
        }
        if (version != null)
        {
            headers.set(HttpHeaderNames.SEC_WEBSOCKET_VERSION,
                    version.toHttpHeaderValue());
        }
        return req;
    }

    public static HttpRequest sucessful()
    {
        return new WebSocketRequestBuilder().httpVersion(HTTP_1_1)
                .method(HttpMethod.GET).uri("/test").host("server.example.com")
                .upgrade(HttpHeaderValues.WEBSOCKET)
                .key("dGhlIHNhbXBsZSBub25jZQ==").origin("http://example.com")
                .version13().build();
    }
}
